Refrigerating coil



April 5 1926.-

J. R. BERND, sR

REFRIGERATING COIL Filed Sept. 8, 1924 m JUI 'SRBPma sr Patented Apr. 6, 1926.

' [ST-Ares i i o Fries. v

' To all whomqz't may otmcemr JULES n. BERND, $3., or JACKSON HEIGHTS,

Application filed September Be it known that I, Johns R. BERND, S12,

a citizen of the United States,.residing at following is a specification.

Jackson Heights, LongIsland, in the county of Queens and State of NeW York, have 111- vented certain fnew anduseful Improvements in Refrigerating Coils, of which the lily said invention consists in an improved construction and arrangement ofan evaporating coil for ammonia refrigerating apparatus whereby friction in the coil'is reduced as well as difierence in pressure at the liquid I inlet and gas outlet whereby a more uniform temperature 111 the entire COll 1s obtained and the operation of the compressor at ahigher back pressure made possible thus increasing'its,capacity; further by my improvedarrangementagreater'B. t. u. transsets ofcoils thereof,

for of heat tqthe square foot "is obtained thereby reducing the. differencein temperature betw'eeneLg the'brine around the ice can in a can freezing system and the ammonia in the, coil and securing a higher temperature of ammonia in the coil for a given brinetemperature all as Wlll be --llBIf1Ii2tftB1 more fully described and claimed.

' Referring to the accompanying drawings which are made a part hereof and 011 whichsimilar reference characters indicate similar parts,f {v y F gure 1 1s aperspectivej v ew showing a series of-, c oils arranged as for use in an ice '-machine and n accordance withmy said invention, and

EigureQ is'anB -d elevation of one of the In [said lraw ngs a portion marked A represents Qtheliquid ammonia supply pipe,

B the liquid headers, O the gas exhaustpipe,

yDthe gas headers, 10, 11, 12 and 13 one setfof pipes leading from one liquid header to the corresponding-gas header; 14;,15, 16 and 17 "another setof 'pipes le'ading'from another liquid header tothe corresponding gas header.

' For convenience that end of the coil containing the manifolds and headers will be referred to hereinafter as the front of the coil and the pipes 10 to 17 will be referred to as extending rearwardly, it being understood that the actual position and arrangement in the practical employment of my 1nvention may be varied at will according to i the dictates of convenience and experience NEW YORK.

REFRIGERATING corn 8, 1924. j Serial 110,736,620.

land also to the nature of the fluid medium utilized.

It will be understood that the coils as illustrated and described may be multipliedfindefinitely and 'instead of each coil. being eight pipes highit may be as high as may be found desirable inthe apparatus required coils it will be noted that the gas headers D are directly above and in line'with the upright liquid headers B and the pipe'and so arranged that the liquid entering each or any pipe of a liquid manifold will enter the corresponding gas manifold oirtlieopposite side of the freezing chamber in'a corre- 8 sponding position, that is the upper pipe 10 leads from the top. of the liquid headerB to the top of the gas header D, the next pipe below 11 leads'into the gas header in a corresponding position below; pipe 10 and soon throughout the coil;

The plpes cross at the end of the freezing chamber opposite the headers or manifolds, as shown, so that as the liquid ammonia passes from the liquid manifold to the gas 9 manifold it takes up or absorbs the heat in theobrine and crosses over through the inclined end section of the coil and passes directly to the ,gasmanifold thereby greatly 'reducingfriction.

Since the pipes operate in multiple instead of in series as has heretofore been customary, the distance traveled by the ammonia inthe pipes is much diminished and therefore the friction is greatly reduced: By reducing-the friction the difference in pressure at the liquid inlet and the gas outlet will be reduced thus giving a 'more uniform temperature in the entir coil. A more uniform temperature in the coil makes it '1' The ammonia gas exhaust pipe C isprov ded with a. connection a leading to; the compressor (not shown) and in'each set of possible to operate the compressor at a higher back pressure thus increasing the ca )acity of the compressor.

y allowing the gas that accumulates in the coil due to evaporation to pass to the gas manifold through several pipes at once more liquid will remain in the coil thus giving a greater B. t. u. transfer of heat per unit of area of the pipes. By increasing the heat transfer I reduce the difference in temperature between the brine around the ice cans and the ammonia in the coil thus giving a higher temperature of the ammonia in the coil for a given brine temperature, or otherwise stated, a lower brine temperature for a given ammonia temperature.

It will be obvious to those skilled in the art that various modifications may be made in the device illustrated in the drawings and described in the specification and therefore I do not limit myself to what is shown in the drawings and described in the specification, but only as indicated in the ap pended claims.

Having thus fully described my said invention what I claim as new and desire to secure by Letters Patent, is:

1. A refrigerating apparatus comprising a coil having units comprising a header for liquid and a header for gas arranged in alined pairs, and a plurality of pipes interposed between headers of alternate pairs said pipes forming conduits of approximately equal length between said headers, substantially as set forth.

2. A refrigerating apparatus comprising a coil having a liquid intake manifold, a gas outlet manifold, a set of headers extending down from one manifold, a set of headers extending up from the other manifold, and a plurality of pipes connecting one of the upper set of headers to one of the lower set of headers said pipes being parallel toeach other said pipes providing multiple conduits of approximately equal length between said headers, substantially as set forth.

3. In a refrigerating apparatus, a liquid inlet manifold, a set of headers thereon, a gas outlet manifold, a set of headers thereon corresponding in position to those of the first-named set, a plurality of pipes connecting a header of one set'to a header of the other set, and a second set of pipes crossing the first set and connecting another pair of gas and liquid headers said pipes providing a multiple of conduits of approximately equal length between said headers, substantially as set forth.

4. A refrigerating apparatus comprising oppositely located liquid inlet and gas outlet manifolds, a set of depending headers on one manifold, a set of headers on the second manifold with individual headers of the second set being alined with those of the first set, a plurality of U-shaped pipes connecting a header of the first set to a header of the. second set, and a plurality of U- shaped pipes crossing the first-named set of pipes and connecting another pair of headers, substantially as set forth.

5. A coil adapted for use in refrigeration comprising a pair of manifolds at the front of the coil, sets of headers on the respective manifolds, and rearwardly extending pipes connected to form conduits each leading from a header of one set to a header of the other set, substantially as set forth.

6. A coil adaptedfor use in refrigeration comprising a pair of manifolds at the front of the coil, sets of headers on the respective manifolds, and sets of parallel rearwardly extending pipes on said headers the pipes of a header in one set being connected to those of a header in the other set to form conduits between said headers, substantially as set forth. 7

7. A coil adapted for use in refrigeration comprising a pair of manifolds in parallel relation, sets of headers connected to the respective manifolds, and pipes connected to the headers extending to one side of a planepassing through said manifolds said pipes being connected at a point remote from said plane in pairs forming conduits eacli leading from a header of one set to a header of the other set, substantially as set forth.

8. A. coil adapted for use in refrigeration comprising a pair of manifolds in parallel relation, sets of headers connected to the respective manifolds, and pipes extending in parallel relation from said headers said pipes being connected at a point remote from said plane in pairs forming conduits each leading from a header of one set to a header of the other set, substantially as set forth.

In witness whereof, I have hereuntoset my hand at Jackson Heights, Long Island, New York, this 27th day of August, A. D. nineteen hundred and twenty-four.

JULES R. BERND, SR. 

